Here’s what I’m thinking of trying. I have the basic Custom door mirrors without task lighting. Not that I think I’d use the task lighting much, but I think those mirrors look much better, and plan on painting the mirror caps to match my truck in Northsky Blue, which are not available off the shelf. There does not appear to be different door wiring harnesses between the Custom mirrors and the basic task lighting mirrors from what I have seen on parts lists, so I assume that the wiring harnesses are the same. If anyone has more detail on this please let me know. Now, I am also planning on adding the fog light kit. I am going on the assumption I can get the switch set for With task lighting and when I have the dealership reflash the fog lights then, if they weren’t plug and play, the task lights on the mirrors as well. Anyway, that’s my plan. Am I being naive? I don’t know if there is a different wiring harness to that switch. At this point all variables are in the wiring harnesses.